Pole-arm.



C. G. ETTE.

POLE ARM.

APPLICATION FILED MAR-1.1915.

1,199,972. Patented. Oct 3, 1916.

MW llllllllllliin'iiiiiil 52 a 41m 1 a dill iililliiiiml mum m: |Illlllllllliiflwlm ll fllh'iinmn mm] IHIWWWIIIIIT'HEEHEE UNITED STATES PATENT CHARLES G. ETTE, OF ST. LOUIS, MISSOURI, ASSIGNOR IO ST. LOUIS MALLEABLE CASTING COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

POLE-ARM.

Application filed March 1, 1915.

Ti; all whom it may concern:

Be it known that I, CHARLES G. E'r'rn, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Pole-Arms, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to devices that are used on poles for supporting insulators.

The main object of my invention is to provide a serviceable and inexpensive pole arm for supporting insulators above the top of the pole or below the top of the pole and some distance laterally away from the pole, or at points above and below the top of the pole, said pole arm consisting of a single cast metal member provided with a plurality of integral portions, each of which is adapted to support one or more insulators.

Another object is to provide a malleable iron pole arm that comprises a vertically disposed shank or body portion provided with integral, laterally projecting, curved ears that partially surround or embrace the pole, and thus effectively prevent said body portion from twisting or turning horizontally said ears being adapted to be bent into engagement with the pole in case they are not of the same curvature as the outer surface of the pole, and said ears being provided with openings for receiving fastening devices that enter the pole and are disposed at an angle to each other.

Other objects and desirable features of my invention will be hereinafter pointed out.

Figure 1 of the drawings is a front elevational view of a pole arm constructed in accordance with my invention that is adapted to be used for supporting a plurality of insulators at a point above the top of the pole; and Fig. 2 is a cross-sectional view taken on the line 22 of Fig. 1.

In the form of my invention shown in Fig. 1 the reference character 1 designates the shank or body portion of my improved pole arm, which is adapted to be connected to the upper end of a pole A. Said body portion 1 projects upwardly some distance above the top of the pole and it is provided at its extreme upper end with a horizontally disposed insulator supporting portion 2 to which one or more insulator pins can be connected, the portion 2 of the arm herein illus- Specification of Letters Patent.

Patented Oct. 3, 1916.

Serial No. 11,320.

trated being designed to carry two insulator P1118 At a point below the insulator supporting portion 2 and slightly above the top of the pole are two horizontally disposed insulator supporting portions 3 that branch laterally from the shank 1 of the arm, each of said laterally projecting portions 3 being designed to carry two or more insulator pins. The shank 1 and the insulator supporting portions 2 and 3 are integrally connected to gether, and said shank is provided at a point below the portions 3 with integral, laterally pro]ecting, curved ears or wings 4 that bear against the outer face of the pole, and each of which has an opening 5 for receiving a fastening device 6 that enters the pole A. The complete device consists of a malleable iron casting which is preferably provided with a fiat, vertically disposed web equipped with forwardly projecting flanges 7 that reinforce and strengthen same.

In the form of my invention sh own in Fig. 1 the flanges 7 on the shank or body portion 1 of the arm are so arranged that said shank is substantially channel-shaped in cross section, and the flanges 7 on the insulator supporting portions 2 and 3 are so arranged that said portions are substantially angle-shaped in cross section, the flanges 7 of the insulator supporting portions 2 and 3 being arranged at the upper edges of same, so as to form relatively wide bearing surfaces for insulator pins 8 of any preferred design. At the point where the insulator supporting portions 3 branch laterally from the shank 1 the vertical web of said shank is widened slightly and is provided with a center opening 9, so that all parts of the device will be of approximately constant cross section. The flanges 7 on the lower portion of the shank 1 merge into the flanges 7 at the upper edges of the insulator supporting portions 3, and the flanges on said portions 3 merge into the side flanges on the upper portion of the shank 1, which side flanges are connected at l their upper ends to the horizontally disposed flange 7 at the upper edge of the insulator supporting portion 2. The shank 1 is preferably provided with annular-shaped reinforcements 10 at the points where the ears or wings 4 branch laterally from said shank, and the fastening device openings 5 in said wings are preferably in the form of open- ,ended slots.

In view of the fact that the ears or wings 4 branch laterally from the shank 1 and curve around the pole, the fastening devices 6, which pass through said ears and enter the pole, are disposed at such an angle with relation to each other and with relation to the center axis of the shank 1 that there is little liability of said fastening devices pulling out of the pole when the arm as an entirety is subjected to strains or pulls in a direction tending to pull it away from the pole A. The cars or wings 4 not only constitute a means for enabling the shank 1 of the device to be securely connected to the pole, but they also act as curved pole-engaging surfaces that have a relatively great bearing area on the surface of the pole, and thus overcome any tendency of the arm as an entirety to twist or turn horizontally on the pole. Furthermore, as the ears 4: are spaced some distance apart, the fastening devices 6 that pass through same securely hold the shank l of the arm in an upright position and prevent it from tilting laterally.

A pole arm of the construction above described can be manufactured at a loW cost, owing to the fact that it consists of a single malleable casting; it comprises means for holding a number of insulators or insulator pins in proper spaced relation to each other; it can be erected quickly and it can be connected to the pole by means of lag screws or other suitable driven fastening devices, owing to the fact that the portions of same through which the fastening devices are inserted are so disposed that the fasten ing devices enter the pole at an angle to each other and at such an angle with relation to the center axis of the shank 1 that they will successfully resist any strains which tend to pull the shank 1 outwardly or away from the pole. Still another desirable feature of a pole arm of this construction is that the laterally projecting wings 1 of same can be bent into snug engagement with the pole by means of a blow of a hammer in case they have not the same curvature as the outer surface of the pole.

Any suitable kind of insulator pins can be mounted on the insulator supporting portions 2 and 3, but I prefer to use insulator pins 8 of the type shown in Fig. 1 that bear squarely on the flanges 7 of the portions 2 and 3 and which are securely connected to said flanges by means of nuts 11 that are screwed onto bolts or screw-threaded extensions 11 that project downwardly through holes in said flanges.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is:

A pole arm consisting of a single malleable casting having a vertically-disposed shank that is adapted to be arranged in an upright position on the upper end of a pole, said shank being substantially channel shape in cross section throughout its entire length, integral horizontal portions on said shank that branch laterally therefrom in opposite directions, said portions being angle shape in cross section and arranged at a point above the top of the pole and lying in the same vertical plane as said shank, the horizontal flange of each of said portions being perforated to receive a plurality of insulators and means on said shank for receiving fastening devices which project into the pole at an angle to each other.

In testimony whereof I hereunto aflix my signature in the presence of two Witnesses, this twenty sixth day of February 1915.

CHARLES G. ETTE.

Witnesses:

WILLIAM L. SOHRAEDER, WVALTER C. RATTHEL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). C. 

